[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT 
	`catalog_catalog_iblock`.`IBLOCK_ID` AS `IBLOCK_ID`,
	`catalog_catalog_iblock`.`PRODUCT_IBLOCK_ID` AS `PRODUCT_IBLOCK_ID`,
	`catalog_catalog_iblock`.`SKU_PROPERTY_ID` AS `SKU_PROPERTY_ID`,
	`catalog_catalog_iblock_iblock`.`VERSION` AS `VERSION`,
	`catalog_catalog_iblock_iblock`.`ID` AS `UALIAS_0`
FROM `b_catalog_iblock` `catalog_catalog_iblock` 
INNER JOIN `b_iblock` `catalog_catalog_iblock_iblock` ON `catalog_catalog_iblock`.`IBLOCK_ID` = `catalog_catalog_iblock_iblock`.`ID`
WHERE `catalog_catalog_iblock`.`PRODUCT_IBLOCK_ID` = 30
/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query
	/home/bitrix/www/bitrix/modules/main/lib/orm/query/query.php:3357
#2: Bitrix\Main\ORM\Query\Query->query
	/home/bitrix/www/bitrix/modules/main/lib/orm/query/query.php:825
#3: Bitrix\Main\ORM\Query\Query->exec
	/home/bitrix/www/bitrix/modules/main/lib/orm/data/datamanager.php:500
#4: Bitrix\Main\ORM\Data\DataManager::getList
	/home/bitrix/www/bitrix/modules/catalog/general/catalog_sku.php:143
#5: CAllCatalogSku::GetInfoByProductIBlock
	/home/bitrix/www/bitrix/modules/iblock/lib/propertyindex/facet.php:45
#6: Bitrix\Iblock\PropertyIndex\Facet->__construct
	/home/bitrix/www/bitrix/modules/iblock/lib/propertyindex/querybuilder.php:28
#7: Bitrix\Iblock\PropertyIndex\QueryBuilder->__construct
	/home/bitrix/www/bitrix/modules/iblock/classes/general/iblockelement.php:662
#8: CAllIBlockElement->MkFilter
	/home/bitrix/www/bitrix/modules/iblock/classes/general/iblockelement.php:3095
#9: CAllIBlockElement->PrepareGetList
	/home/bitrix/www/bitrix/modules/iblock/classes/mysql/iblockelement.php:326
#10: CIBlockElement->prepareSql
	/home/bitrix/www/bitrix/modules/iblock/classes/mysql/iblockelement.php:666
#11: CIBlockElement::GetList
	/home/bitrix/www/local/components/custom/catalog/component.php:92
#12: include(string)
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:605
#13: CBitrixComponent->__includeComponent
	/home/bitrix/www/bitrix/modules/main/classes/general/component.php:680
#14: CBitrixComponent->includeComponent
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:1046
#15: CAllMain->IncludeComponent
	/home/bitrix/www/tehnika/index.php:173
#16: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#17: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2

( ! ) Fatal error: Uncaught Bitrix\Main\DB\SqlQueryException: Mysql query error: (2006) MySQL server has gone away in /home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php on line 137
Call Stack
#TimeMemoryFunctionLocation
15.37275157328Bitrix\Main\Diag\ExceptionHandler->handleException( ).../exceptionhandler.php:0
( ! ) Bitrix\Main\DB\SqlQueryException: Mysql query error: (2006) MySQL server has gone away in /home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php on line 137
Call Stack
#TimeMemoryFunctionLocation
15.37275157328Bitrix\Main\Diag\ExceptionHandler->handleException( ).../exceptionhandler.php:0
25.38325159056CAllMain::{closure:/home/bitrix/www/bitrix/modules/main/classes/general/main.php:3419-3426}( ).../main.php:0
35.38325159080ob_end_flush ( ).../main.php:3424
45.38325162184CMain->EndBufferContent( ).../main.php:3424
55.38325163256ExecuteModuleEventEx( ).../main.php:3172
65.38335162880Bitrix\Main\Analytics\Counter::onBeforeEndBufferContent( ).../module.php:480
75.38355163024Bitrix\Main\Analytics\SiteSpeed::isIntranetSite( ).../counter.php:92
85.38355163024Bitrix\Main\ORM\Data\DataManager::getList( ).../sitespeed.php:95
95.38355164448Bitrix\Main\ORM\Query\Query->exec( ).../datamanager.php:500
105.38395167896Bitrix\Main\ORM\Query\Query->query( ).../query.php:825
115.38395167896Bitrix\Main\DB\MysqliConnection->query( ).../query.php:3357
125.38395167896Bitrix\Main\DB\MysqliConnection->queryInternal( ).../connection.php:330